Bungie isnt stupid. If they wanted to sell the Halo rights, they would've done it right after Halo 3, and right now it looks unlikely they would considering the release of Halo 3: ODST, the 2010 Halo: Reach, and a completely unnanounced project, it could be more Halo, it could be a new marathon, or..it could be a completely new IP.

"You are, all of you, vermin. Cowering in the dirt, thinking, what? That you might escape the coming fire? No...your world will BURN untill its suface is but glass.

Bungie is no longer owned by MS but MS still owns Halo. You are never going to see Halo on another console.

QFT - This is why Halo Wars was made by another Microsoft owned developer. And it's how MS is able to launch halo waypoint and all that other halo related media. Bungie has sudo creative control over the unsiverse. But Microsoft owns the rights to the franchise.

I think what your source is talking about is that Bungie is leaving the Halo franchise to Microsoft under a new developer called 343 Studios. Halo: Reach is Bungie's last Halo game, and they have a new non-Halo game, and I'm thinking it will be based in the universe of Bungie's older game, Marathon.